CSS flex-basis Property
Description
The flex-basis
property determines the base of the flex , which is the initial size of the element. Similar to the width and height properties to which the contents of an element are added.
- Initial value
- auto
- Applies to
- Flex items, including in-flow pseudo-elements
- Inherited
- No
- Media
- Visual
- Computed value
- As specified, but with relative lengths converted into absolute lengths
- Animatable
- Yes
- CSS Version
- CSS3
- JavaScript syntax
- object.style.flexBasis
Syntax
flex-basis: auto | <size>
Values
- autoIndicates auto size based on the content of the item.
- <size>Specifies the size of the element in px, mm, pt or in percent along the main axis. In this case, the size is calculated relative to the parent. A negative value is not valid.
Example
<div class="flex-container">
<div class="flex-item one">First</div>
<div class="flex-item two">Second</div>
<div class="flex-item three">Third</div>
</div>
.flex-container {
display: flex;
height: 300px;
color: #fff;
font-size: 2em;
flex-flow: column wrap;
}
.flex-item {
display: flex;
align-items: center;
justify-content: center;
}
.one {
background: #508694;
margin-right: 10px;
flex-basis: 100%;
order: 1;
}
.two {
background: #BB844C;
margin-bottom: 10px;
flex: 1 1 0;
order: 2;
}
.three {
background: #929D79;
flex: 1 1 0;
order: 3;
}
Browser Support
Desktop | |||||
11 | 12 | 29 | 22 | 12.1 | 9 |
Tablets / Mobile | |||||
![]() |
|||||
4.4 | 29 | 22 | 12.1 | 9 | 2.0 |
Last updated by CSSPortal on: 4th November 2019
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